Abstract
Gear pumps of a prototype series 2PW-SEW belonging to II group were the research object. Wrocław University of Technology in co-operation with the company HYDROTOR S.A. designed the units. The experimental pump has been designed with taking into consideration technological possibilities of the company HYDROTOR S.A. The innovation of the prototype unit is based on using oblique gears with an involute tooth modified in the lower and upper part of the profile. The modification in the lower part was made using the so-called tooth root undercutting. Multivalent logic trees with designated rank of importance parameters structural/operational were used, considering the effect of tolerances construction. The area has been increased by cutting the oblique teeth. In order to determine the influence of the manufacturing technology on the level of the emitted noise, it has been decided to make gears using the shaving technology.
Highlights
Hydraulic systems are being increasingly used because of the high-power transmission capabilities with relatively high efficiency
Axles of gears are mounted with a predetermined clearance and loaded with radial force acting on the divided bearing bodies
Among the positive displacement pumps used in hydraulic propulsion systems as energy generators, gear pumps are the most widespread
Summary
Hydraulic systems are being increasingly used because of the high-power transmission capabilities with relatively high efficiency. Among the positive displacement pumps used in hydraulic propulsion systems as energy generators, gear pumps are the most widespread. Their participation is estimated at more than half of all pumps manufactured. The working hydraulic system is a source of mechanical vibrations caused mainly by shock pressure changes, periodic character of displacement pump operation. Vibrations generated in this way are characteristic at different frequencies, so there are different ways to transfer them [5]. Such a large span is mainly connected with the adopted manufacturing tolerance
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